SNAP-ACTION SWITCHES
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Q
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
Q1
SNAP-ACTION SWITCHES
Micro-limit pushbutton switches
are used in many applications including microwave ovens,
vending machines, copy and fax machines, medical and security equipment, computer peripherals
and many others. They are characterized by close tolerance precision switching positions and long
service life. APEM micro-limit switches are 100% electronic tested prior to shipment to insure
proper operation and conformance with specifications.
DEFINITIONS OF TERMS
Free position
Position of the switch actuator when no force is
applied.
Operating position
The position of the actuator when the contact snaps.
Overtravel position
The final position of the actuator.
Release position
The position of the actuator when the contact snaps
back from the operating position to original position.
Contact opening gap
The distance between the open contact pair.
Pretravel
The distance between free and operating positions.
Overtravel
The distance the actuator travels after the contact
actuates.
Movement differential
The distance from the operating to release position of
the actuator.
Free travel
The distance between the release and free positions.
1
2
3
4
A
B
C
D
E
F
I
II
III
IV
free position
operating position
overtravel position
release position
total travel
free travel
back travel
pretravel
overtravel
movement differential
total force
operating force
differential force
release force
Back travel
The distance between the overtravel and release
positions.
Total travel
The sum of pretravel and overtravel.
Operating force
The force required to cause snap action of contact.
End operating force
The force to be applied to keep the actuator in the
allowed final position.
Release force
The force applied to the actuator at the moment the
contact snaps back from the operating position.
Differential force
The difference between the operating force and the
release force.
Mechanical life
The minimum number of actuations with no load on
the switch.
Electrical life
The minimum number of actuations at rated voltage,
rated current and resistive load at 20°C ambient
temperature.
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Q
FORCE vs.
TRAVEL
DIAGRAM
Q2
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
MB SERIES - SNAP-ACTION SWITCHES
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
FEATURES
Ratings: 10 Amps 250 VAC (resistive load). 1.5 Amps 250 VAC (motor load).
Single pole CO (change-over or alternate action), NC (normally closed momentary) and
NO (normally open momentary) configurations.
Close tolerance switching action with long life (10,000,000 mechanical cycles min.).
Pin plunger, hinge lever or roller lever actuator options.
MATERIALS
Contacts:
Actuator:
Case & cover:
Terminals:
Stationary: Nickel silver Shorting: Beryllium copper
POM (UL94HB)
PBT (UL94V-O)
Silver plated copper/zinc
AGENCY RECOGNITION
NRTL
Q
SPECIFICATIONS
Operating force:
Pretravel:
Overtravel:
Movement differential:
Free position:
Operating position:
Operating temperature:
Contact gap:
Tracking resistance:
- 10 oz. (274 grams) approx.
- .039" (1mm)
• .024" (0.6mm)
- .005" (0.13mm)
- .366" (9.3mm)
.331" ± .012" (8.4mm ± (0.3mm)
-40°C to +85°C
< .118" (3mm)
>PTI 175
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
Q3
MB SERIES - SNAP-ACTION SWITCHES
ORDER FORMAT
M B D 5 B 1
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
Series
MB
Circuit & quick-connect terminals
D
E
F
G
H
J
Normally open (solder terminal)
Normally closed (solder terminal)
Change-over (solder terminal)
Normally open (p.c. terminal)
Normally closed (p.c. terminal)
Change-over (p.c. terminal)
Switch rating
5
10(1.5)A 250 VAC
Actuator style
A
Pin actuator
B
Hinge actuator
C
Roller actuator
Length
Actuator
length
and fixed
position-
(see table
below)
STANDARD MODELS
Circuit
Terminals
.
Pin plunger with radius
Pin plunger, spherical form
Lever type
Hinge lever
Fix
EH
EV
EH
EV
EH
EV
EH
EV
EH
EV
EH
EV
Act. length
.189" (4.8mm)
.276" (7.0mm)
.276" (7.0mm)
.370" (9.4mm)
.098" (2.5mm)
.185" (4.7mm)
.185" (4.7mm)
.280" (7.1mm)
.098" (2.5mm)
.185" (4.7mm)
.185" (4.7mm)
.280" (7.1mm)
MBD5B
MBD5B2
MBD5B1
MBD5B3
MBD5C
MBD5C2
MBD5C1
MBD5C3
MBD5E
MBD5E2
MBD5E1
MBD5E3
MBG5B
MBG5B2
MBG5B1
MBG5B3
MBG5C
MBG5C2
MBG5C1
MBG5C3
MBG5E
MBG5E2
MBG5E1
MBG5E3
MBE5B
MBE5B2
MBE5B1
MBE5B3
MBE5C
MBE5C2
MBE5C1
MBE5C3
MBE5E
MBE5E2
MBE5E1
MBE5E3
MBH5B
MBH5B2
MBH5B1
MBH5B3
MBH5C
MBH5C2
MBH5C1
MBH5C3
MBH5E
MBH5E2
MBH5E1
MBH5E3
MBF5B
MBF5B2
MBF5B1
MBF5B3
MBF5C
MBF5C2
MBF5C1
MBF5C3
MBF5E
MBF5E2
MBF5E1
MBF5E3
MBJ5B
MBJ5B2
MBJ5B1
MBJ5B3
MBJ5C
MBJ5C2
MBJ5C1
MBJ5C3
MBJ5E
MBJ5E2
MBJ5E1
MBJ5E3
Normally open
Solder
MBD5A
MBD5D
P.C.
MBG5A
MBG5D
Normally closed
Solder
MBE5A
MBE5D
P.C.
MBH5A
MBH5D
Change-over
Solder
MBF5A
MBF5D
P.C
MBJ5A
MBJ5D
Roller lever
Q
Simulated
roller lever
NO =
NORMALLY OPEN:
NC =
NORMALLY CLOSED:
NC (2)
CO =
CHANGE-OVER:
NC (2)
COM (1)
NO (4)
COM (1)
NO (4)
COM (1)
Q4
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
MB SERIES - SNAP-ACTION SWITCHES
ACTUATORS AND SPECIFICATIONS
actuator length
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
actuator length
actuator length
operating
position
operating
position
EV
EH
operating
position
EV
EH
EV
EH
Hinge lever
Actuator
.
Actuator length, inches ±.031"
Dim 'A'
±0.8mm
Fixed position, EH=rear EV=front
Operating force, - grams
Pre-travel, - inches
- mm
Overtravel, min. inches
min. mm
Overtravel, max. inches
max.mm
Movement diff.- inches
- mm
Free position, - inches
- mm
Operating position, Dim 'B', inches
Tolerance inches ±
Operating position, Dim 'B', mm
Tolerance mm ±
Order code
Roller lever
Hinge lever
.189
4.8
EH
100
.177
4.5
.030
0.75
.059
1.5
.035
0.9
.551
14
.421
.063
10.7
1.6
B
.276
7.0
EV
45
.354
9
.049
1.25
.098
2.5
.059
1.5
.709
18
.472
.118
12
3
B2
.276
7.0
EH
85
.197
5
.030
0.75
.059
1.5
.047
1.2
.591
15
.437
.071
11.1
1.8
B1
.370
9.4
EV
40
.394
10
.059
1.5
.118
3
.071
1.8
.787
20
.492
.138
12.5
3.5
B3
.098
2.5
EH
110
.177
4.5
.030
0.75
.059
1.5
.028
0.7
.748
19
.622
.063
15.8
1.6
C
Roller lever
.185
4.7
EV
50
.354
9
.049
1.25
.098
2.5
.059
1.5
.866
22
.669
.118
17
3
C2
.185
4.7
EH
95
.197
5
.030
0.75
.059
1.5
.039
1
.787
20
.638
.071
16.2
1.8
C1
.280
7.1
EV
40
Simulated roller lever
Simulated roller lever
.098
2.5
EH
115
.177
4.5
.030
0.75
.059
1.5
.028
0.7
.748
19
.630
.063
16
1.6
E
.185
2.7
EV
60
.354
9
.049
1.25
.098
2.5
.059
1.5
.866
22
.677
.118
17.2
3
E2
.185
4.7
EH
95
.197
5
.030
0.75
.059
1.5
.039
1
.787
20
.646
.071
16.4
1.8
E1
.280
7.1
EV
50
.394
10
.059
1.5
.118
3
.071
1.8
.945
24
.697
.138
17.7
3.5
E3
.394
10
.059
1.5
.118
3
.071
1.8
.945
24
.689
.138
17.5
3.5
C3
MECHANICAL OUTLINES
Q
Normally open
Change-over
Side view (w/solder terminal)
Normally closed
P.C. terminal
Q5
APEM
, 63 NECK ROAD, HAVERHILL, MA USA 01835-0788 TOLL FREE: (877) 246-7890 FAX: (978) 372-3534 E-mail: info@apem.com
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